Vehicle Depreciation Calculator
Free Vehicle Depreciation Calculator: calculate vehicle depreciation instantly with transparent formula, worked examples and tips. No signup.
Vehicle depreciation is the reduction in a car's market value over time — typically the single largest cost of ownership over any three-to-five year period. A depreciation calculator estimates how much value your vehicle loses each year by comparing the purchase price against the expected residual value at your planned disposal date. New cars typically lose 15–35% of their purchase price in the first year alone, and 50–60% over three years. Loan Payment Calculator and Mortgage Calculator extend this analysis into full running-cost modelling.
Understanding depreciation is critical for total-cost comparisons: a car with a lower purchase price but poor residual value can cost more to own over three years than a more expensive vehicle that retains its value. Annual depreciation is the most useful per-year metric for budgeting and comparing finance options against outright purchase.
- Enter the vehicle's purchase price (new list price or used price paid).
- Enter the expected residual value — the projected market price when you sell or trade in. Cap HPI and Glass's Guide publish benchmark residual value percentages by model and age.
- Enter the ownership period in years.
- The calculator outputs Annual depreciation (value lost per year), total depreciation, and depreciation expressed as a percentage of purchase price.
Vehicle depreciation formula
Annual depreciation = (Purchase price − Residual value) ÷ Ownership period (years)
Depreciation per mile = (Purchase price − Residual value) ÷ Total miles driven
Percentage depreciated = ((Purchase price − Residual value) ÷ Purchase price) × 100
Worked example: Car purchased at £25,000. Residual value after 3 years: £12,000. Total depreciation: £13,000. Annual depreciation: £13,000 ÷ 3 = £4,333/year. At 10,000 miles/year that is £0.43/mile in depreciation cost alone.
Interpreting your depreciation result
Residual value benchmarks by vehicle segment
Typical 3-year residual value as a percentage of new purchase price: mainstream family hatchbacks — 45–55%; premium saloons — 50–58%; electric vehicles (model-dependent) — 40–65%; luxury SUVs — 45–60%; MPVs — 35–50%; city cars — 40–55%. High mileage reduces residual value materially below benchmark. Diesel residual values have fallen since tightening emissions regulations. Rare or limited-edition models may hold value above these ranges. Use the residual value figure from cap HPI or Glass's Guide for the most accurate result.
Finance tips and best practices
- Choose models with strong residual value track records — brands such as Toyota, Volkswagen Group, and BMW Group vehicles historically hold value better than many alternatives in the same segment.
- Mileage is the largest driver of depreciation after time — keeping annual mileage near the segment average (approximately 10,000 miles/year in the UK) minimises residual value penalty.
- Service history documentation significantly affects residual value — a full documented service history typically adds 5–15% to the achievable resale price over an undocumented equivalent.
- Popular colours (silver, grey, black, white) depreciate more slowly than unusual colours — uncommon colours can reduce residual value by 3–8%.
- New cars lose on average 19% of their value in the first year of ownership — the steepest annual depreciation over the ownership cycle (RAC, 2023).
- Over three years, the average new car retains approximately 40–55% of its purchase price as residual value.
- Depreciation accounts for approximately 40–50% of total vehicle ownership cost over a standard three-year period for an average UK driver.
- Electric vehicle residual values vary widely — some EVs depreciate significantly faster than petrol equivalents due to rapid technology change and battery range uncertainty.
Common mistakes to avoid
- Ignoring depreciation when comparing purchase prices — a cheaper car with poor residual value can cost thousands more to own over three years than a pricier model with stronger retention.
- Using the manufacturer's purchase price instead of the real transaction price — dealer discounts reduce purchase price but residual value benchmarks are set against list price; negotiate the cap cost.
- Not adjusting residual value for planned mileage — cap HPI residual value guides assume standard annual mileage; high mileage reduces the residual value materially below the benchmark figure.
- Confusing depreciation with negative equity on a finance deal — if financed on PCP, the outstanding balloon may exceed the car's residual value if depreciation runs faster than the finance schedule assumed.
Residual value data referenced here is based on industry valuation guides including cap HPI and Glass's Guide, which publish benchmark used values by make, model, age, and mileage. Actual resale values depend on condition, full service history, regional demand, and market conditions at the point of sale. Depreciation estimates produced by this calculator are for planning and comparison purposes only; they do not constitute a formal vehicle valuation. For insurance, finance, or legal purposes always obtain a current market appraisal from a qualified motor trade professional.